How To Tell if a Hamster Is Pregnant [8 Signs]

Hamsters are hassle-free, adorable pets loved by many. However, these rodents are prolific breeders, and it can be hard to tell when they’re pregnant. If this is your first time caring for a hamster—a female one—you may want to know if it’s pregnant, especially if you notice her round belly.

Here’s how you can tell if a hamster is pregnant:

The female hamster is sexually mature.
She was with males in the last three weeks.
Your hamster has a swollen belly.
You noticed she has visible nipples.
Your hamster has been building a nest.
She has been hoarding food.
Your hamster is eating and drinking more than usual.
She’s agitated and restless.

Keep reading as I discuss further how you can check if your hamster is pregnant. As a loving and responsible pet owner, this knowledge will help you support your pet and keep her safe and healthy during a time when she feels the most vulnerable.

I’ll also include tips to help you create a safe environment for the hamster pups.

Table of Contents

How To Tell if a Hamster Is Pregnant

Here are the signs to know if a hamster is pregnant.

1. The Female Hamster Is Sexually Mature

Since hamsters live only for about three years, they attain puberty quickly. Female hamsters reach sexual maturity at around 6 to 7 weeks of age. However, some breeds mature faster than others.

For instance, the female Syrian hamster attains sexual maturity by 4 to 6 weeks of age.

You can rule out pregnancy in your pet hamster if she is less than four weeks old. If you don’t want your hamster to get pregnant and birth pups, you should remove her from the cage and keep her separated from the males as soon as she reaches sexual maturity.

2. She Was With Males in the Last Three Weeks

The average length of pregnancy of a hamster is about 16 days. This period varies across species. The average gestation period of the golden hamster is about 16 days. Dwarf hamsters birth their pups at around 21 days, while the Chinese and Siberian (Roborovski) hamsters take close to 23 days.

For your pet hamster to be pregnant, she’d need to have been around a male hamster within the last three weeks. If she hasn’t been in male company for over four weeks, she’s not pregnant.

You can rule out pregnancy in your mature female hamster if she has always lived alo